Shadow Dungeon Error

[Siltharious]

when I attempt to enter Shadow Dungeon for my mage quest, I get this following error::confused:
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Microsoft Visual C++ Runtime Library

Runtime Error!

Program: C:\Program Files\Outspark\Fiesta\Fiesta.bin

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.

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Please respond back if you know of any ways to solve this error, thank you.